When considering the ocean sunfish, one might not envision a creature weighing up to two tonnes and adorned with parasites, including on its eyeballs. In a captivating episode of “The Nature of Things 101,” Sarika Cullis-Suzuki delves into the peculiar world of this fish, renowned as one of the largest and most unique in the ocean.
Cullis-Suzuki marvels at the ocean sunfish’s unconventional appearance, noting its massive circular body, lack of a tail, and oversized fins, which set it apart from traditional fish species. Through a life-size model, she showcases to co-host Anthony Morgan the distinct features of the Mola mola, shedding light on why this fish is often underestimated.
Known for their extensive travels, ocean sunfish navigate long distances, diving hundreds of meters deep multiple times a day in search of sustenance. However, their leisurely pace, large surface area, and movement across various water zones make them susceptible to parasites, as Cullis-Suzuki explains in detail.
These fish host a plethora of parasites, spanning from their skin to their internal organs, with scientists identifying a staggering 73 parasite species infesting the Mola mola and related ocean sunfish varieties. Remarkably, some parasites even harbor their own parasites, highlighting the intricate ecosystem within these creatures.
To combat these parasites, sunfish employ unique tactics such as breaching, leaping out of the water and crashing back down, potentially to dislodge unwanted hitchhikers. Additionally, they allow smaller fish and birds to feed on the parasites, showcasing a symbiotic relationship in the marine world.
Despite our current knowledge, the ocean sunfish remains a species ripe for further exploration and study. Cullis-Suzuki emphasizes the ongoing quest to unravel more mysteries surrounding these fascinating creatures, underscoring the need for continued research and observation.
For those intrigued by the ocean sunfish’s enigmatic nature, “The Nature of Things 101” can be viewed on CBC Gem or the “The Nature of Things” YouTube channel for a deeper dive into this captivating underwater world.